Croft



PATENTED FEB. 23, 1904.

J. S. BANGROFT.

l TYPE MOLD. APPLICATION FILE'D MAY 29, 1903.

2 SHEETS-SHEET 1.

N0 MODEL.

V 8 M k w: ,7 a J 7 MAIWK liq "-No. 752,814. PATENTED FEB. 23, 1904.

' J; s. BANCROIT.

TYPE MOLD.

APPLICATION FILED MAY 29. 1903.

43 l/ m m m r P t m'JA fifi ww J Jud [21M 7 Luau 9 4wFLw/AHU6. a 3mm 2 m m 2 I W ,m. h V M a W 4 V M NO. 752,814. Patented February 23, 1904.

UNITED STATES P TENT ()EEIOE.

JOHN SELLERS BANCROFT, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO LANSTON MONOIYPE MACHINE COMPANY, OF PHILADELPHIA,

PENNSYLVANIA, 'A OORPORATION OE" VIRGINIA.

TYPE-MOLD.

SPECIFICATION formingpart of Letters Patent No. 752,814, dated February 23, 1904.

7 Application filed May 29; 1903. Serial No. 159.363. (No model.)

T all wh m i 71ml} W rm ble at will or automatically to accord with the Be it known that I, JOHN SELLERS BAN- different width of characters occurring in the CROFT, a citizen of the United States, residing same font, the difficulties confronting the mold at Philadelphia, county of Philadelphia, State maker are correspondingly increased, espe- 5 of Pennsylvania, have invented certain new cially if economy and durability are also to be and useful Improvements in Type-Molds;and taken into account. Attempts have hereto- I do hereby declare the following to be a full, I fore been made to produce molds of this char- 5 5 clear, and exact description thereof, reference acter for use in connection with type casting being had to the accompanying drawings, and composingmachines such as those of Patforming a part of this specification, and to the 1 ents Nos. 633,088 and 625,998; but they have figures of reference marked thereon. heretofore been unsuccessful either by reason The present invention, although in several of cost of production, difliculty of adjustment,

particulars applicable to other varieties of or inaccuracy and lack of stability under difmolds, is specially designed for use upon or ferent conditions of use, all of which objec- I5 in connection with that class of molds emtions are sought to be removed or overcome ployed in type casting and setting machines by the present invention, as hereinafter fully for giving form and dimension to type-bodies; described, the novel features being pointed 5 and it has for its objects to enlarge the ca out in the appended claims. pacity of such molds and facilitate their ad,- In the accompanying drawings, illustrating 2 justment or adaptation to different sizes of a preferred form of embodiment of said in type-bodies, to increase the stability of the vention, Figure 1 is a perspective view of the mold as a whole after adjustment and under mold. Fig. 2 is a partial horizontal section. 7 varying conditions of use, to reduce cost of Fig. 3 is a vertical section on line on of Fig. construction with an increase rather than at 2. Fig. 4 is a section on the line Z) I), Fig. 1.

25 a sacrifice of accuracy, and to improve the Fig. 5illustrates a modified form of adjusting character of the product. means for holding the mold-blade togposition.

For well-recognized practical reasons it is Fig. 6 is a detail view showing one corner of required that commercial type shall be of unithe mold. Fig. 7 is a rear elevation. Fig. 8 form or standard length, (height,) with the is a side elevation, and Fig. 9 is abottom plan 3 body portion rectangular in cross-section and view, of the mold. Fig. 10 is a partial vertiprovided with parallel opposite sides. Variacal section on the line 0 c, Fig. 7. Fig. 11 is tions are permitted and, in fact, required as a partial vertical section on the linedd, Fig. to two dimensions to accommodate different 7 Fig. 12 is a partial vertical section on the faces, one of said dimensions being uniform line a 6, Fig. 7. Fig. 13 is a bottom view of 35 for each font or style of characters and the the intermediate or filling piece, carrying the other variable to suit different widths of char blocks forming the side walls of 'the moldacters in the same font. In the production of cavity. Fig. 14 is a top View of the portion 5 such articles by casting not only is great skill of the bottom plate receiving the intermediate and care required in constructing the mold of support, Fig. 13.

4 proper dimensions with straight parallel walls, Likenumerals of reference in the several but its stability under conditions of use is a figures indicate the same parts. factor of equal importance, for the slightest The base-section 1, preferably rectangular 9 variations in the forms or relative positions in outline, has its upper surface dressed flat of the casting-faces will be reproduced in the to serve as a base-line for the erection of the 45 type. When to these conditions are added caseparate members, and its lower surface is pacity for variation or'adjustment as to two difurnished with projecting bearings 2, prefer- Inensions, the one fixed with relation to a given ably three in number and disposed in trianfont or series of characters and the other variagular relation, the surfaces of said bearings being dressed to a plane parallel with the upper surface of the base. The object in thus providing the base-section with a plurality of supporting-bearings instead of a continuous plain surface is to facilitate the correct seating ofthe mold upon its support and to diminish cost of construction.

A slight warping of the supporting-surface or the presence of fragments of metal or dirt will prevent a proper seating of a plane surface when it would afford an ample support for the projectingbearings. Moreover, corrections for slight warpage incident to the hardening process can the more readily be effected.

It is to be borne in mind that in this class of molds, wherein the centering of the matrix isaccomplished independently of, but with relation to the mold, the matrices being applied one at a time to the upper face of the mold and seated thereon to close one end of the mold-cavity metal-tight, it becomes very desirable that the face of the mold with which the matrix contacts should stand in a plane perpendicular to the axis of the matrix and of the mold-cavity. Hence the desirability of a level and firm seating of the mold.

Upon the upper face of the base-section 1 is mounted the rectangular parallel-sided block 3, whose upper face supports the side blocks 1 and 5 and mold-blade 6, the reciprocating cross-blade 7, provided with offset 8, containing the jet opening or passage 9 and the ejector 10, the block 11, to which is attached the adjustable guide 12, and the ejector-cam 13, all these parts, with the exception of the means for adjustment and attachment to be presently described, being substantiallythe same as the corresponding elements disclosed in the mold of Patent No. 625,998 and adapted to similar uses. In this particular style of mold the intermediate block 3 serves merely to elevate the mold-cavity above the offset 8 of the crossblade to form and sever the jet; otherwise it would not be required, and the side blocks and mold-blade may contact directly with the basesection or other intermediary.

The front wall of the mold-cavityis supplied by the side of cross-blade 7, the side walls by the side blocks 4: 5, and the rear wall by the mold-blade 6. The intervals between the proximate faces of the side blocks determines one dimension of the mold-cavity, corresponding to height columnwise of the character, While that between the proximate faces of the cross-blade and mold-blade determines another gimension in a plane at right angles to the rst.

In order to produce square-bodied type with parallel opposite faces, it is required that the proximate faces of the side blocks 4c 5 should be maintained in parallel planes and that a change in the relation of the side blocks for dimensioning the mold and involving a substitution of mold-blades should involve a correlative adjustment of both side blocks in order to properly position the mold-cavity relatively to the centering-point of the matrix, inasmuch as the latter is not determined or affected directly by any adjustment of the mold itself. To accomplish this and at the same time preserve the desired parallelism of the opposite faces of the mold-cavity, the following arrangement has been devised. Each side block 4 5 has its molding and rear faces formed accurately at right angles, one to another and perpendicular to its lower surface, the latter contacting with the flat surface of block 3, to which it is secured in a manner to permit limited lateral adjustment, as by screws 1 1 or 15. Block 3 is in turn adjustably secured to the base-section, as by screws 16, and to insure additional strength and rigidity fastening devices, such as screws 17 connect the base-section 1 and side blocks 1 5 in a manner to cause the latter to engage and press block 3 upon the upper surface of the base. Thus ample provision is made for permitting either independent or simultaneous adjustments of the side blocks in a plane parallel with the upper surface of the base-section for maintaining the molding-surfaces perpendicular to the base under all conditions and for firmly clamping and holding the side blocks. To preserve the parallelism of the moldingsurfaces in the other direction, while permitting adjustment and increasing the rigidity of the mold, the rear faces of the side blocks 4: 5 are engaged by the flat surface of a bar or block 18, the latter engaging the rear face of block 3 and the upper surface of the basesection 1, to which it is secured by screws 19 in a manner to permit horizontal adjustment. This block 18 is secured to block 3 and side blocks 4: 5 by screws 25, and it operates to aline the rear faces of the side blocks. Said block 18 is provided with a recess 20 for the passage of the mold-blade and carries the adjustable stops 21 for limiting its forward movement.

Competent means are supplied for effecting the horizontal adjustment of the side blocks relatively to each other and longitudinally of the block 18 to both dimension the mold-cavity and position the latter and for adjusting block 18 in conjunction with block 3 and side blocks 1 5 for eflecting a bodily shift of the mold-cavity relatively to the centering-point of the matrix, so as to bring the mold-cavity in proper relation to the matrix-cavity for different fonts, this adjustment being permitted by a corresponding adjustment of guide 12.

The form of adjusting means shown for shifting the block 18 consists of two pairs of screws 22 23 at each end of said block, of which the one, 22, is threaded into the block with its head overlapping and engaging basesection 1, while the other, 23, is threaded into the base-section and its head engages block 18.

By loosening one screw and tightening the other either or bothends of the block 18 can be advanced or retracted upon the base-section. A similar means of adjustment (screws 122 and 123) is interposed between the end of block 18 and side block 5 for regulating the position of the latter. e e

The side blocks 4 5. when adjusted to dimension the mold are fixed in position, whereas the mold-blade 6 is a movable member whose position is shifted at will or automatically to vary the other dimension of themold-cavity. This requires that the mold-blade should be of the proper thickness to form ametal-tight joint with the side blocks and at the same time be free to reciprocate. Heretofore ithas been the practice. to employ the mold blade as a gage insetting the side blocks; but this practiceis .open to serious objection, as a certain degree of clearance between the mold-bladeand theside'blocks is required, for if the latter are set up too tight the mold-blade will be prevented from moving or become hung up, as it is termed, and if set too far apart the joints will. be opened sufficiently to permit thepassage of molten metal, thereby not onlyclogging the guideway, butproducing fins onvthe type-body. f i

- Another defect of the prior mold was the cutting awayof the mold-blade for the accommodation of a cross-piece applied to the tops of theside blocks for connecting the latter and forming a guide or bearing for holding the mold-blade down upon its seat on block 3. It is of course necessary that some means be employed for sustaining the mold-blade against vertical displacement; but it was found in practice that the removal of metal from the upper edge so weakened the mold-blade that the upper portion of its casting-surface was liable to be sprung or displaced under the pressure of the injected metal, thus destroying the parallelism of the opposite sides of the mold-.cavityto such an extent that the type produced would possess tapering instead of parallel opposite sides. To avoid this, the body of the mold-blade is made of full height, and alongitudinal central opening 26 is formed for the reception of the holding-down guide, and instead of employing the mold-blade for adjusting the side blocks a separate gage-plate is supplied. 1n the present instance these two functions are joined in a single block 27 inserted in the opening 26 and against which the side blocks 4 5 are tightly clamped.

The gage 27 is dimensioned as to width to correspond with the particular set or font of type to be cast, so that when the side blocks 4: 5 are tightly clamped upon it the mold-cavity will be exactly of the required width.

The mold-blade, of which there is one for each number or size of gage, is made of the proper thickness proportionally to the gage to afford the requisite clearance without binding or permitting escape of metal.

In its capacity as top guide for the moldblade the lower edge of the gage is caused to engage and bear upon the lower wall of the slot or opening 26, suitable adjusting means being supplied for the purpose.

lateral-displacement and provide a convenient means for setting them up against the interposed gage 27 during initial adjustment, the side blocks are bored or drilled for the reception of a rod or bolt 28, one endof which is screwed or otherwise secured to block 5, while To'still further brace the side blocksagainst the opposite end carries a nut 29 inengagethe gage, and a screw 30 is arranged to impinge upon bolt to spring itslightly, and thus depressthe g'ageto hold themold-blade to its seat. An equivalent means for efiecting this adjustment of the gage or holding-down guide '27 is illustrated in Fig. 5, wherein the holding-bolt is furnishedwith a tapered portion Thus, as illusengaging the lower face of a tapering or inclin'ed seat in the block27 for forcing the latter down upon the mold-blade,

A water-circulation system similarLto that of Patent No. 625,998 is employed but not illustrated.

The molding-surfaces of the cross-blade and side block 4: are preferably formed flat and true, as heretofore, but those of block 5 and the mold-blade are slightly roughened as by the action of a coarse'file or grinder, the object being to produce type-bodies slightly roughened on two of their surfaces to prevent rising and facilitate locking up in the form. This roughening of the surfaces is not of a character or depth to afford openings for the escape ofmetal. At the same time it produces on the type-bodies a series of biting-ridges, which, contacting with the smooth face of adjacent type, overcomes the tendency to rise when subjected to lateral pressureas in aform.

From the foregoing detailed description it will be apparent how the various adjustments are performed. To diminish the mold in one direction, the proper gage and mold-blade are inserted between the side blocks, the gage is set down upon the mold-blade, and the side blocks clamped rigidly upon the gage. As a preliminary to this adjustment the side block 4 and alining-block 18 are adjusted to bring the mold-cavity in proper relation to the centering-point of the matrix, or these adjustments may be made after the side blocks have been clamped together upon the gage, after which the holding-screws are tightened and the mold-blade rendered rigid, with the exception of the cross-blade, which is movable for the discharge of the type, and the moldblade which is movable to dimension the mold-cavity.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a type-mold such as described the combination with the side blocks and cross-blade, of a mold-blade provided with a central 1ongitudinal opening and a brace extending through said opening and engaging the side blocks; substantially as described.

2. In a type-mold the combination with the side blocks and mold-blade, the latter provided with a transverse opening, of a dimensioninggage located within said opening in the moldblade; substantially as described.

3. In a type-mold the combination with the stationary side blocks and a movable moldblade, of a gage interposed between the side blocks and located within an opening in the mold-blade; substantially as described.

4. In a type-mold the combination with the side blocks of a movable mold-blade provided with a central longitudinal opening and a guide located within said opening and engaging the mold-blade, to hold the latter to its seat; substantially as described. 7

5. In a type-mold the combination with the side blocks and mold-blade, the latter provided with a transverse opening, of a dimensioninggage located within said opening and contacting with the side blocks and the mold-blade; substantially as described.

6. In a type-mold. the combination with the side blocks and apertured mold-blade, of a dimensioning-gage and mold-blade guide located within the opening in the mold-blade and engaging the side blocks, and means for adjusting said gage to contact with the mold-blade; substantially as described.

7 A type-mold such as described provided with side blocks; an aperture mold-blade; a dimensioninggage interposed between the said blocks and located within the aperture in the mold-blade; and a bolt connecting-the side blocks and extending through said gage provided with adjusting means for shifting said gage into contact with the mold-blade.

8. In a type-mold the combination with the side blocks, apertured movable mold-blade and supporting-block, of a dimensioning-gage extending transversely through the mold-blade and engaging the side blocks, and a bolt connecting the side blocks and extending through said gage; substantially as described.

9. The combination to form a type-mold such as described of the base-section, the intermediate block the side blocks adjustably secured to said intermediate block, the movable mold-blade, the alining-block adjustably secured to the side blocks, and adjusting devices intermediate the base-section and said alining-block for shifting the latter and side blocks, upon the base-section; substantially as described.

10. A type-mold such as described comprising a base-section, an alining bar or block, means for laterally adjusting said alining-bar upon the base-section, side blocks engaging said alining-bar, means for adjusting the side blocks longitudinally of said alining-bar, a dimensioning gage intermediate the side blocks, and means for securing said elements rigidly in adjusted position.

11. A type-mold such as described comprising a base-section provided with a plurality of seating projections or surfaces; an aliningbar; means for adjusting said alining-bar laterally upon the base-section; side .blocks engaging the alining-bar provided with means for adjustment longitudinally of said bar; a dimensioning-gage interposed between said side bars; mold-blade movable between the side blocks.

12. A type-mold such as described provided with a mold-cavity the casting-surface of which is slightly roughened as and for the purpose set forth.

13. In a type-mold such as described, the combination to form the mold-cavity, of a rough-faced side block, a smooth-faced side block, a rough-faced mold-blade, and a smoothfaced cross-blade or opposing wall.

JOHN SELLERS BANCROFT.

Witnesses:

MORTIMER A. J ONES, W. A. START. 

